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#10542: Add 4 macros to work with surrogates: Py_UNICODE_IS_SURROGATE, Py_UNICODE_IS_HIGH_SURROGATE, Py_UNICODE_IS_LOW_SURROGATE, Py_UNICODE_JOIN_SURROGATES.

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Ezio Melotti 2011-08-22 20:03:25 +03:00
parent 3d1706fa83
commit 8c9375bb59
3 changed files with 34 additions and 0 deletions
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9
Include/unicodeobject.h
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@ -362,6 +362,15 @@ typedef PY_UNICODE_TYPE Py_UNICODE;
for (i_ = 0; i_ < (length); i_++) t_[i_] = v_;\
} while (0)
/* macros to work with surrogates */
#define Py_UNICODE_IS_SURROGATE(ch) (0xD800 <= ch && ch <= 0xDFFF)
#define Py_UNICODE_IS_HIGH_SURROGATE(ch) (0xD800 <= ch && ch <= 0xDBFF)
#define Py_UNICODE_IS_LOW_SURROGATE(ch) (0xDC00 <= ch && ch <= 0xDFFF)
/* Join two surrogate characters and return a single Py_UCS4 value. */
#define Py_UNICODE_JOIN_SURROGATES(high, low) \
(((((Py_UCS4)(high) & 0x03FF) << 10) | \
((Py_UCS4)(low) & 0x03FF)) + 0x10000)
/* Check if substring matches at given offset. The offset must be
valid, and the substring must not be empty. */